diff --git a/core/lib.rs b/core/lib.rs
index a032dea1e..a851e7281 100644
--- a/core/lib.rs
+++ b/core/lib.rs
@@ -474,7 +474,7 @@ impl Statement {
         Ok(Rows::new(stmt))
     }
 
-    pub fn reset(&self) {
+    pub fn reset(&mut self) {
         self.state.reset();
     }
 
diff --git a/core/vdbe/builder.rs b/core/vdbe/builder.rs
index c796ee5f9..796782640 100644
--- a/core/vdbe/builder.rs
+++ b/core/vdbe/builder.rs
@@ -54,7 +54,7 @@ impl ProgramBuilder {
             next_free_register: 1,
             next_free_label: 0,
             next_free_cursor_id: 0,
-            next_free_parameter_index: 1.into(),
+            next_free_parameter_index: 1.try_into().unwrap(),
             insns: Vec::new(),
             next_insn_label: None,
             cursor_ref: Vec::new(),
diff --git a/core/vdbe/mod.rs b/core/vdbe/mod.rs
index 80732cf9d..50db5538a 100644
--- a/core/vdbe/mod.rs
+++ b/core/vdbe/mod.rs
@@ -252,7 +252,7 @@ impl ProgramState {
         self.parameters.get(usize::from(index) - 1)
     }
 
-    pub fn reset(&self) {
+    pub fn reset(&mut self) {
         self.parameters.clear();
     }
 }